Fix: return negative error code in list_lttng_ust_global_events()
[lttng-tools.git] / src / common / sessiond-comm / agent.h
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1/*
2 * Copyright (C) 2013 - David Goulet <dgoulet@efficios.com>
bdf64013 3 * Copyright (C) 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
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4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License, version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc., 51
16 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17 */
18
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19#ifndef AGENT_COMM
20#define AGENT_COMM
f20baf8e 21
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22#include <stdint.h>
23
24#include <lttng/lttng.h>
25
26/*
2f2540d7 27 * Command value passed in the header.
f20baf8e 28 */
022d91ba 29enum lttcomm_agent_command {
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30 AGENT_CMD_LIST = 1,
31 AGENT_CMD_ENABLE = 2,
32 AGENT_CMD_DISABLE = 3,
33 AGENT_CMD_REG_DONE = 4, /* End registration process. */
34 AGENT_CMD_APP_CTX_ENABLE = 5,
35 AGENT_CMD_APP_CTX_DISABLE = 6,
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36};
37
38/*
56cc432e 39 * Return codes from the agent.
f20baf8e 40 */
022d91ba 41enum lttcomm_agent_ret_code {
aa277e3e 42 /* Success, assumed to be the first entry */
bdf64013 43 AGENT_RET_CODE_SUCCESS = 1,
aa277e3e 44 /* Invalid command */
bdf64013 45 AGENT_RET_CODE_INVALID = 2,
aa277e3e 46 /* Unknown logger name */
bdf64013 47 AGENT_RET_CODE_UNKNOWN_NAME = 3,
23c2bd47 48 AGENT_RET_CODE_NR,
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49};
50
51/*
022d91ba 52 * Agent application communication header.
f20baf8e 53 */
022d91ba 54struct lttcomm_agent_hdr {
f20baf8e 55 uint64_t data_size; /* data size following this header */
022d91ba 56 uint32_t cmd; /* Enum of agent command. */
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57 uint32_t cmd_version; /* command version */
58} LTTNG_PACKED;
59
60/*
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61 * Enable event command payload. Will be immediately followed by the
62 * variable-length string representing the filter expression.
f20baf8e 63 */
bdf64013 64struct lttcomm_agent_enable_event {
2106efa0 65 uint32_t loglevel_value;
b2064f54 66 uint32_t loglevel_type;
f20baf8e 67 char name[LTTNG_SYMBOL_NAME_LEN];
a0ba721c 68 uint32_t filter_expression_length;
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69} LTTNG_PACKED;
70
71/*
72 * Disable event command payload.
73 */
bdf64013 74struct lttcomm_agent_disable_event {
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75 char name[LTTNG_SYMBOL_NAME_LEN];
76} LTTNG_PACKED;
77
78/*
56cc432e 79 * Generic reply coming from the agent.
f20baf8e 80 */
022d91ba 81struct lttcomm_agent_generic_reply {
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82 uint32_t ret_code;
83} LTTNG_PACKED;
84
85/*
86 * List command reply header.
87 */
022d91ba 88struct lttcomm_agent_list_reply_hdr {
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89 uint32_t ret_code;
90 uint32_t data_size;
91} LTTNG_PACKED;
92
93/*
56cc432e 94 * List command reply payload coming from the agent.
f20baf8e 95 */
022d91ba 96struct lttcomm_agent_list_reply {
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97 uint32_t nb_event;
98 /* List of event name each of them ending by a NULL byte. */
99 char payload[];
100} LTTNG_PACKED;
101
022d91ba 102#endif /* AGENT_COMM */
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